BT has deemed lots of exchanges and cabinets as not economically viable for upgrade, hence the council and BDUK funding to plug the gaps.
Rest assured there are still lots of cabinets which are being excluded and in effect abandoned by BT/BDUK and not upgraded; so that's still lots of gaps.
...and we not talking about ones with 5 lines on them either.
Like mine with 200 odd subscribers on it. (I'm 7 miles from a city centre not half way up a mountain either)
Like the village I know elsewhere in the home counties of 100 residents where the exchange is 4+ miles away and the cabinet is 2 miles away on a main road. They get 0.5Mbps at the moment and all look forward with interest how exactly they are going to get the 2Mbps by 2017 they are promised.